Wrench



(No Model.)

W. OOONNELL, Jr

WRENCH.

Patented Jan. 31,1882.

INVENTOR.

WITNESSES Y E N R O T T A Uwrrao STATES PATENT Caries;

WILLIAM OCONNELL, JR, OF PITTSFIELD, MASSACHUSETTS.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 253,089, dated January 31, 1882.

Application filed December 13, 1881. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM OCONNELL, Jr., of Pittsfield, in the county of Berkshire and State of Massachusetts, have invented certain new and useful Improvements in Wrenches; and I do hereby declare the following. to be a lull, clear, and exact description of the inven tion, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to an improvement in wrenches; and it consists in certain details in construction and combinations of parts, as will be more fully explained, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of my improved wrench, and Fig. 2 is a side view, partly in section.

A represents the lever, provided at its lower end with the handle B, and at its upper end with the convexjaw O,which latter is of greater width than the remaining portion of the lever, so as to present an enlarged bearing-surface of the pipe or bolt being operated on, and also to form a stop or limit of the upward movementof the niovablejaw D. This levcrAis also provided with any desired number of slots E, which latter are situated on the front edge thereof, and instead of being in the shape of half-circle, as generally made, they are formed at about two-thirds of a circle,and are adapted for the reception and retention of the fulcrumpin G, of the same form. The movablejaw D is provided at its lower end with the arms F, which latter are adapted to embrace the lever Aaud be secured thereon by the fulcrum-pin G, which latter is made in the shape of a two thirds circle and of the same size as the slots E in the lever A, but capable of being forced out of said slots. The movable or upper jaw is connected to the lever A, as above described,

vand instead of the biting portion thereof being concave to conform to the convex stationary jaw C, it is formed angular, as shown in the drawings, so as to grasp the pipe or bolt at three distinct points, instead of at the center, which prevents the crushing of the pipe when more than ordinary force is required to be exerted thereon. This slidingjaw D is also provided with the fiat spring H, which latter is secured to the back of the movable jaw, and is adapted to bear and slide on the back edge of lever A. This spring H is provided with the ears or keeper 1) to hold it in proper position on the lever.

In order to adjust thewrench it is simply necessary to force the upper end of the movable jaw D upward from thelever A, and at the same time exert sufficient downward pressure on the lower end of the same to force the fulcrum-pin out of the notch in the lever when the smallest diameter of said pin is turned opposite the opening of the slots. When the pin G has been withdrawn from the slot in the lever the movable arm D is free to bemoved up or down until the proper position has been reached, when by releasing the said arm D the pin will be forced into the adjacent slot.

By means of myimprovements the movable jaw D is constantly kept in working position, and is not allowed to swing independently on its fulcrum, while the peculiar construction of the fulcrum-pin and slots renders it impossible for the fulcrum-pin to become accidentally disengaged from the slot.

It is evident that slight changes in the con struction of the different parts might be resorted to without departing from the spirit of my invention, and hence I would have it understood that I do not limit myself to the exact construction of parts shown and described, but consider myself at liberty to make such changes as come within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the lever A, projaw D, provided with the arms F, adapted to specification in the presence of two subscribembrace the lever, the fulcrum-pin G, coning witnesses. structed to be inserted and turned within said slots, and thus locked therein, and the spring 5 H, secured at one end to the jaw D, while its Witnesses:

opposite end bears upon the lever A, substan- JOHN OGONNELL, tially as set forth. WM. GOSMAN TROITER.

In testimony whereof I haye signed this WM. OOONNELL, JR, 

